Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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Kitchen aid KSM90

Would only run at high speed. Now does not run at all. Brushes appear to be good.
Thank you
gas@velocity.net

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If you can unplug the mixer and test resistance between leads of the selector switch. The resistance should vary from high to low as you move the selector from low to high. If cord and all else looks good and switch is bad replace the switch.

Posted on Mar 26, 2008

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Replaced phase and speed control board and mixer still doesn't work! Bad words are flying around here tonight!


Michelle,

Have you taken the brushes out of the mixer at any point? I see quite often people remove the brushes, and then they are inserted incorrectly when put back in, the brushes will fit in in any direction, but there is only one way to put the brushes in properly.

when you look at the brush, the carbon portion is square with one side cut off, the brush holder inside the mixer is shapped the same way. use a flash light to match up the brush, after installed correctly the mixer should turn on and function correctly.

If it does not then you should call into us, when around your mixer and we can do more trouble shooting over the phone.

Thank you,

Colleen
The Mending Shed
801-225-8012

Mar 20, 2014 | KitchenAid KITCHEN AID 5 Quart Artisan...

1 Answer

My KitchenAid KSM90 will not turn on at all.


First make sure that the mixer is plugged into a working outlet. Were there any symptoms the last time you used your mixer? Check the cord on the mixer for damage. If the cord shows any wear replace it immediately.

At any point in time have you removed the brushes or adjust the speed control plate? After checking the cord, remove the brushes from the mixer, check to see if they are pitted, if they are replace the brushes. Please pay extra attention when putting the brushes back in the mixer, there is a dog-eared side of the brush, match this up to the brush holder to make sure the brush is inserted correctly.

If the brushes are not the problem check the speed control plate. If you remove the end cover from the mixer you can gain direct access to the speed control plate. There are 3 screws on this plate, the top two are used to adjust the speed of the mixer, the bottom one spaces the on/off switch contact. Try adjust the bottom screw to see if the mixer will turn on, it is possible the on/off switch was out of place.

Try these first, if none of this works let me know and we can continue trouble shooting.

Here is a link to the cord for your mixer: http://www.mendingshed.com/mixercord2.html
Here is a link to the brushes: http://www.mendingshed.com/kitchenaidbrushes.html
Here is a link to the speed control plate: http://www.mendingshed.com/speedcontrol.html
And here is a link to the service manual for your mixer, it has more troubleshooting ideas on the last few pages: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf

Thank you,

Colleen
Customer Service
MendingShed.com
customerservice@mendingshed.com
800-339-9297

Apr 13, 2013 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

My kitchenaid mixer run on high at all times


If your mixer only runs on high speed there are 3 things that can cause that. The first thing to check will be the speed control plate, Remove the trim and end cover on the mixer, the first thing you should see is the speed control plate, this has 3 screws on it, try adjusting the top two screws 1/4 turn, this should slow the mixer down, do not over tighten. Also check to see if the control plate spring is unhooked. If the spring is unhooked, attach to bottom of the control plate, and squeeze the spring end.
If this does not fix your mixer, check the wiring of the mixer, you can locate a wiring diagram on the last page of the service manual.
If the speed control plate is adjusted correctly and all the wiring is correct it will be your speed control phase board. You can test the speed control phase board to see if it is shorted. With the line cord disconnected, pull the t-b ar contacts to open, and insert a piece of paper between them so they cannot close. Reapply power-the mixer should just run or buzz trying to run. If it operates at full speed, teh phase control board is defective and needs to be replaced.
Here is a link to the service manual: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf
This will aid you in taking the mixer apart, troubleshooting and putting it back together, remember the wiring diagram is the very last page.
Thank you,
Colleen
Customer Service
MendingShed.com
800-339-9297

Jan 07, 2013 | KitchenAid K5SS Mixer Speed Control Plate...

1 Answer

No power to my kitchen aid mixer


please i need help kitchen aid mixer i have no power

Jun 27, 2012 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

MY kitchen Aide mixer was running alittle rough /loud and now has stop completely. It is approx 24 years old and has never had any problems. It is hard to find a local repair [place. any suggestions


Two things you can do for a 24-year old machine:

1. Replace both motor brushes (Black large plastic Caps on each side
of the Moto Housing). Without these, the motor wouldn't even run.
2. Replace the Worm Gear (the cause of the Rough Loud noises)

Download a copy of the Repair Part List from Kitchenaid.com for
your model KSM90.

Also don't forget to tighten all the screws inside the mixers and use
fresh Kitchenaid Grade Food Grease for all the gears.

Jun 21, 2011 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

Kitchen Aid Model K5SS.Ran only on higher speeds for a time,now wont run at all.Power supply and brushes ok.


Hello oldandnew2,

The problem is in the speed switch, the contacts are closed and not allowign power to go thru it is a common problem with all of the kitchen aid mixer over a period of time the contactors get carbon build up. Take the back off and look at the bottom inside and there should be two little contactors see if the are burnt and try and clean them. If this does not work you will need a new one, post back the the tread and I will locate you one.

Thank you for being a member of FIxYa.

Feb 27, 2011 | KitchenAid 32685 Mixer

1 Answer

Kitchenaid mixer won't run changed out brushes and have changed them out in all 4 different positions


The brushes need to be seated onto the armature. Try going from off to high quickly and tapping the motor housing. Once the motor starts, let it run for 15 min plus to seat the brushes. Keep clear of or remove beaters whille trying to get the moror running. In brief, the brushesaren't making good contact with armature. Good Luck

Aug 11, 2010 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

Seating the brushes on the Kitchenaid ksm90 mixer


You don't need to seat the brushes. Remove the brush caps and pull the brushes out by their springs, being VERY careful to note the position of them since they only go back in one way. Measure the free length of the spring before pulling it out. It is critical that you write down the length sticking out with very slight pressure on it so that it is seated against the armature when you measure.

Clean the curved surface of the carbon brushes with a sharp knife being careful not to scratch the curved surface. If you have them installed wrong they will not go all the way in and will not contact the armature and it will not run. Measure the length, as done above, of the spring to make sure it is in correctly!! If it is not in correctly the spring will stick out 1/4 inch longer than it should.

Apr 21, 2010 | KitchenAid KSM90 Ultra Power Series Stand...

2 Answers

KITCHEN AID MIXER WILL NOT WORK


If you have had the brushes out (under the big screws on each side) verify the cut corner of the brushes are oriented properly. Look inside the hole with a flash light and you will see where the cut corner needs to be.

Dec 31, 2007 | KitchenAid KSM90 Ultra Power Series Stand...

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